You can find unique O names for girls across the globe. Some are vintage, while others are modern. A few of them are popular, but the majority are rare. In the U.S., girl names that start with O are inherently unique, with few making the top 1,000.
We’ve done our research to find you a wide range of O names of various styles, lengths, and origins. We are “optimistic” our “original” O names for girls will make you feel “overjoyed!”
100 Popular Female Names That Start With O
Read on to discover 100 gorgeous names for girls that start with O.
Oak
Oak is an excellent hippy name – in line with Ocean, Blossom, or Daisy. It’s short yet unique, appealing to simple name lovers looking for something out of the norm. You can use it alone or as a nickname for the more popular Oakley, Oaklee, or Oakland.
- Origin: English
- Meaning: Oaktree
Oakland
Oakland was initially an Old English surname derived from “ac” (oak) and “land.” It has strong unisex vibes, appealing to gender-neutral name enthusiasts. Oakland’s association with trees and the earth could be perfect for a future environmentalist.
- Origin: English
- Meaning: Oak land
- Variations: Oaklan
Oakley
Oakley was traditionally an English surname. Its association with American sharpshooter Annie Oakley makes it a badass option for a girl who will break the stereotypes.
- Origin: English
- Meaning: Oak clearing
- Popularity: Oakley’s popularity is rising for U.S. girls, ranked 193rd in 2021.
Oaklynn
Oaklynn is a variation of Oakley combined with the popular suffix “lyn.” The double-n version is more popular than the single-n in the U.S., ranked 204th and 572nd in 2021. We predict Oaklynn will enter the U.S. top 100 in a few years. Choose it now, before it’s too mainstream.
- Origin: English
- Meaning: Oak clearing
- Variations: Oaklyn
- Popularity: Oaklynn entered the top 1,000 names for U.S. girls in 2017.
Oana
Oana is a shortened version of the Romanian name Ioana. Its religious meaning makes it an attractive option for a girl of the Christian faith. Its tricky pronunciation, however, could cause some trouble stateside.
- Origin: Romanian
- Meaning: God is gracious
- Pronunciation: WAH-na
- Variations: Olena
Oanez
Oanez is an unusual option on our list of women’s names that start with O, as the Breton form of Agnes. It’s derived from the Breton “oan” (lamb), making it a sweet choice for animal lovers. While Agnes sounds old-fashioned, Oanez sounds modern, making it the perfect variation for your 21st-century babe.
- Origin: Breton
- Meaning: Lamb
- Pronunciation: WAH-nes, OH-ah-nez
- Variations: Agnes
Oba
Oba is a powerful O name for girls, used as an honorific title for rulers in West Africa. In Yoruba mythology, Oba was also one of the wives of Shango – the god of thunder and lightning. Oba is simple yet exotic, potentially appealing to parents with African heritage.
- Origin: Yoruba
- Meaning: King
- Pronunciation: OH-bah
Obdulia
Obdulia is rare outside of Spain, associated with an obscure Spanish saint. The name was popular in Spain during the 1920s and 30s before slowly falling out of favor. Obdulia could be an appealing option for members of the Catholic faith.
- Origin: Spanish
- Meaning: Unknown
- Pronunciation: ob-DHOO-lya
- Namesakes: Saint Obdulia, a Spanish virgin who was venerated at Toledo, Spain.
- Popularity: Obdulia fell out of Spain’s top 500 girl names in the 1960s.
Obeline
Obeline is derived from the Greek “obelos” (nail, rod, pointed pillar) combined with the French ending “ine.” The name was somewhat common in French-speaking areas of Canada in the early 1900s. Today, Obeline is pretty rare. So, if you’re a unique name lover, you may want to “nail” this one down.
- Origin: French
- Meaning: Nail
- Pronunciation: AH-BUH-line
- Variations: Obelia, Obelie, Obéline
Ocean
Ocean is a natural choice on our list of girl names with O, ultimately derived from the Greek Okeanos. It may be an appealing option for environmentalists or beach dwellers. Although the name’s currently more popular for U.S. boys, its melodic and calming sound works for either gender. A sweet option for a girl with blue eyes.
- Origin: English, Greek
- Meaning: Ocean
- Pronunciation: OH-shin
- Namesakes: Ocean Hellman, a former Canadian actress best known for her role in the Danger Bay TV series.
- Popularity: In the U.S., Ocean was ranked 711th for boys and 874th for girls in 2021.
Oceana
Oceana is the feminine form of Oceanus – a Titan who controlled the rivers and sea nymphs in Greek mythology. It was first coined as a girl’s name in the early 19th-century. Oceana is more feminine-sounding than Ocean, making it an excellent option for a little girl who’s as calm and beautiful as the sea.
- Origin: Greek
- Meaning: Ocean, body of water
- Pronunciation: o-shee-AWN-ah
- Namesakes: Oceana Mahlmann, a German singer with musical roots in soul, reggae, hip hop, and funk.
Ocie
Ocie is a cute, unisex name of unknown origin. Some scholars believe it’s derived from the Latin “octavus” (eighth). It’s most often used in the southeastern United States. This uncomplicated name is bursting with Southern charm.
- Origin: English
- Meaning: Unknown
- Pronunciation: OH-see
- Variations: Ossie
Octavia
Octavia is an ancient title borne by the wife of Mark Antony and sister of the Roman emperor Augustus. It was occasionally given to the eight-born child in 19th-century England. Octavia sounds classy and influential, making it well-suited for a girl in high society.
- Origin: Latin
- Meaning: Eighth
- Pronunciation: ok-TA-wee-a, ahk-TAY-vee-ah
- Namesakes: Octavia Estelle Butler, an American science fiction author and a multiple recipient of the Hugo and Nebula awards.
- Popularity: Octavia was ranked 248th for U.S. girls in 2021.
October
October is derived from the Latin “octo” (eight), which denotes the year’s eighth month. Month-based names like March, June, and August are pretty popular. October isn’t as typical, making it a cool month name for a baby born in the fall.
- Origin: Latin
- Meaning: Eighth
- Variations: Oktober
Odalys
Odalys is a feminine variation of Odalis, primarily used in Latin American countries. Odalys is cute and quirky, with sweet nickname options like Oddie or Liss. Your Odalys could be rich in more ways than one.
- Origin: Spanish
- Meaning: Wealth, fortune
- Pronunciation: O-DAHL-is
- Variations: Odalis
- Namesakes: Odalys García, a Cuban actress, model, singer, and show host.
- Popularity: Odalys left the U.S. top 1,000 in 2002.
Odelia
Odelia is either a religious Hebrew name or a variation of Odilia – a Germanic name from “odal” (fatherland) or “aud” (wealth, fortune). It could be an original alternative to the popular Ophelia.
- Origin: Hebrew, English, Germanic
- Meaning: I will thank God, fatherland, wealth
- Pronunciation: oh-DEE-lee-ah
- Variations: Odilia
- Popularity: Odelia left the U.S. top 1,000 names for girls in 1910.
Odell
Odell was initially a surname derived from the Old English “wad” (woad – a plant that produces blue dye) and “hyll” (hill). Although Odell sounds masculine, the nicknames Dell, Delly, or Della could give it a feminine edge.
- Origin: English
- Meaning: Woad hill
- Pronunciation: o-DEHL
- Namesakes: Odell Elliott Brown Jr., an American jazz organist active in the late 1960s and early 1970s.
- Popularity: Odell left the top 1,000 names for girls in 1935.
Odessa
Odessa is an adventurous girl’s name that feels like it was ripped from a fantasy novel. It’s often viewed as the feminine form of Odysseus – the Greek hero in Homer’s epic poem, the Odyssey. Odessa is fearless and exciting enough for a future explorer.
- Origin: Greek
- Meaning: Son of pain
- Pronunciation: OH-dess-ah
- Namesakes: Odessa Cleveland, an American film and television actress best known as Lieutenant Ginger Bayliss from the television series M*A*S*H.
- Popularity: Odessa left the top 1,000 U.S. girl names in 1956.
Odette
Odette is the French feminine form of Otto. It’s more original than other “ette” names like Juliette, Annette, or Bernadette but equally charming. Fans of the arts will appreciate the connection to the princess transformed into a swan by an evil sorcerer in the famous ballet Swan Lake (1877).
- Origin: French
- Meaning: Wealth, fatherland
- Pronunciation: AW-DEHT
- Variations: Auda, Oda, Odilia, Odila
- Namesakes: Odette Sansom, an agent for the United Kingdom’s clandestine Special Operations Executive in France during the Second World War.
- Popularity: Odette left France’s top 500 in 1977.
Odyssey
Odyssey is a rare choice on our list of female names that start with O, associated with the epic poem written by Homer in the 8th-century. The poem is about Odysseus, a hero who wanders for ten years after the Trojan War. Your little Odyssey could find a daring adventure of her own.
- Origin: Greek
- Meaning: An adventurous voyage
- Pronunciation: AA-duh-see
Ofira
Ofira is a modern variation of Ophir – a biblical name borne by a son of Joktan in the Old Testament. More recently, Ofira was an Israeli settlement in Egypt, occupied from 1967 to 1982. The name may appeal to those of the Jewish faith.
- Origin: Hebrew
- Meaning: Unknown
- Pronunciation: o-FEER-ah
- Variations: Ofir, Ophir
Ofra
Ofra is a modern Hebrew form of Ophrah – a biblical name borne by a man and a city in the Old Testament. Ofra was traditionally only given to males. However, its adorable meaning, “a” ending, and association with female pop singer Ofra Haza have made it common for girls.
- Origin: Hebrew
- Meaning: Fawn
- Pronunciation: AWF-rah
- Variations: Ophrah
- Namesakes: Ofra Haza, an Israeli singer, actress, and Grammy Award-nominated recording artist commonly known as “The Israeli Madonna” in the West.
Ohana
Are you looking for a sweet Hawaiian name that shows how much you love your family? Then, consider Ohana – the Hawaiian word for all kinds of family, whether they are blood-related, adopted, or international. Your little Ohana’s kindness will make everyone feel like she’s part of the family.
- Origin: Hawaiian
- Meaning: Family
- Pronunciation: OH-HA-NAH
Oishimaya
Oishimaya is an unusual Bengali name almost exclusively used in India. It’s thought to mean “good deeds” and is usually chosen for a kind person with no evil in their heart. It may also mean “divine illusion.” This long name can be shortened to Maya to make it more approachable.
- Origin: Bengali
- Meaning: Good deeds
- Pronunciation: OH-EE-she-mai-uh
Ojai
Ojai is a place name associated with a city and valley in Southern California. It’s the Hispanic form of the Chumash word “ ʼawhaʼy” (moon). Ojai is spunky, fun, and youthful, so it could be perfect for a girl as bright and beautiful as the moon.
- Origin: Spanish, Chumash
- Meaning: Moon
- Pronunciation: O-hie
Oka
Oka is a Japanese name meaning “chrysanthemum,” a flower native to East Asia. In Japan, chrysanthemums are an emblem of the Imperial Family, symbolizing royalty, longevity, and rejuvenation. This floral name is pretty enough for a princess.
- Origin: Japanese
- Meaning: Chrysanthemum
- Pronunciation: OH-KAH
Oksana
Oksana is typical in Ukraine and Russia, with several notable singers, athletes, and actresses bearing the name. Ukrainian figure skater and former world champion Oksana Baiul put the name on the map stateside. Perhaps your little Oksana will be as talented as her forebearers.
- Origin: Ukrainian, Russian, Greek
- Meaning: Hospitality
- Pronunciation: uk-SA-nah
- Variations: Oxana, Aksana
- Namesakes: Oksana Petrovna Grigorieva, a Russian singer-songwriter and pianist.
- Popularity: Oksana left Ukraine’s top 100 in 1995.
Olalla
Olalla is a beautiful Spanish name derived from the Greek “eu” (good, sweet) combined with “laleo” (to talk). It’s associated with two Spanish saints and martyrs, giving it a religious flair. All of the l’s in Olalla make it a bit tricky to pronounce. But, when said correctly, it’s an elegant choice, especially for a girl with a voice as sweet as honey.
- Origin: Galician, Spanish
- Meaning: Sweetly-speaking
- Pronunciation: o-LA-ya
- Variations: Eulalia, Olaya
- Popularity: Olalla was popular in Spain in the 1980s.
Olamide
Olamide is an exotic Yoruba name – a West African ethnic group inhabiting parts of Nigeria, Benin, and Togo. The most famous bearer is Nigerian rapper Olamide Adedeji, known for his singles First of All and Voice of the Street. This unisex name could be a cool option for a little girl (especially if her parents are rap fans).
- Origin: Yoruba
- Meaning: My wealth has arrived
- Pronunciation: uh-LAA-muh-day
- Namesakes: Olamide Gbenga Adedeji, a Nigerian rapper, singer, and songwriter considered one of the most influential artists in Africa.
Oleda
Oleda is an elegant variation of the Latin name Alida (also meaning “small winged one”). If you think your baby is an angel sent from above, Oleda could perfectly capture this sentiment.
- Origin: Latin
- Meaning: Small winged one
- Pronunciation: OH-LEE-dah
- Variations: Alida
Oleksandra
Oleksandra is the Ukrainian version of Alexandra. While Alexandra’s been common in the U.S. since the 1940s, Oleksandra is only popular in Ukraine. Oleksandra could be an original and majestic alternative to Alexandra.
- Origin: Ukrainian
- Meaning: Defending men
- Pronunciation: AH-lek-sandra
- Variations: Alexandra, Aleksandra
- Namesakes: Oleksandra Nikolayenko-Ruffin, a Ukrainian model and actress.
- Popularity: Oleksandra was previously ranked in the top 10 in Ukraine.
Olena
Olena is the Ukrainian form of the Greek name Helen. This gorgeous O name for girls is rarely used outside its home country. Olena’s beauty and simplicity give it great potential in the U.S. (and beyond).
- Origin: Ukrainian, Greek
- Meaning: Torch, shining light
- Pronunciation: OH-LEE-nah
- Variations: Olenna, Olinia, Olinija, Olenya, Olinda, Olina, Lina, Olinia, Olenka, Olenochka, Olinija
- Namesakes: Olena Krasovska, a Ukrainian hurdler who won the silver medal at the 2004 Olympics.
Olethea
Olethea is an uncommon variation of Alethea, never making the top 1,000 in any country. This virtuous name could make your daughter a pillar of honesty, integrity, and truthfulness.
- Origin: Latin
- Meaning: Honest
- Pronunciation: OW-LEH-thee-yah
Olexa
Olexa is a variation of the Polish and Ukrainian masculine name Oleksa. In the U.S., similar-sounding Alexa has significantly declined in popularity since Amazon released the Alexa device in 2014. Olexa could be the perfect alternative (that won’t set off your smart devices)!
- Origin: Ukrainian, Polish
- Meaning: Defender of mankind
- Pronunciation: OH-leks-ah
Olga
Olga is the Russian version of the Old Norse name Helga. It’s associated with Saint Olga of Kiev, a Russian ruler who attempted to convert her subjects to Christianity. Your little Olga could be as powerful (and saintly) as her namesake.
- Origin: Russian, Old Norse
- Meaning: Holy, blessed
- Pronunciation: OL-gah
- Variations: Olha
- Namesakes: Saint Olga of Kiev, the first recorded female ruler in Russia and the first member of the ruling family of Kiev to adopt Christianity.
- Popularity: Olga left the U.S. top 1,000 names in 1996.
Olia
Olia is a variation of Olya used across Eastern Europe. It may also be a modern, feminine form of the Old Norse masculine name Helge (holy, blessed). Nicknames range from the cool Ollie to the feminine Lia, allowing you to easily adjust the name to fit your daughter’s personality.
- Origin: Russian, Georgian, Moldovan, Old Norse
- Meaning: Holy, blessed
- Pronunciation: OH-lee-ah
- Variations: Olya
- Namesakes: Olia Lialina, an Internet artist, theorist, and experimental film and video critic and curator.
Olianna
Olianna combines the Scandinavian Ole with the Latin Anna. It’s also a variation of Olena (the Ukrainian form of Helen). It sounds similar to Oleander – a beautiful shrub with large pink flowers. Olianna is one of the prettiest O names for plant lovers.
- Origin: Scandinavian, Latin, Ukrainian
- Meaning: Grace of the ancestor
- Pronunciation: OL-ee-anna
- Variations: Oliana
Oline
Oline is the feminine version of Ole, most commonly used in Norway and Denmark. The name made the U.S. charts once in the late 1800s before falling off the map. It could be a charming (and original) option for an American girl with a Scandinavian heritage.
- Origin: Norwegian, Danish
- Meaning: Ancestor’s descendant
- Pronunciation: OH-leen-eh, OH-leen
- Popularity: Oline was ranked 49th in Norway in 2021.
Olive
Olive is a vintage girl’s name, popular in the U.S. in the early 1900s. It re-entered the top 1,000 names in 2007 and continues to rise in popularity. Olive could be an adorable pick – especially for foodies.
- Origin: English, Latin
- Meaning: Olive tree
- Namesakes: Olive Thomas, an American silent-film actress, art model, and photo model.
- Popularity: Olive’s popularity is rising in the U.S., ranked 182nd in 2021.
Olivera
Olivera is much less common than the male form, Oliver, which has been the 3rd most popular name for U.S. boys since 2019. It was first used during the medieval era. Nicknames range from unisex Oli to vintage Vera.
- Origin: Serbian, Germanic
- Meaning: Descendant of the ancestor
- Pronunciation: aa-luh-VEH-ruh
- Namesakes: Olivera Despina, a Serbian princess, and consort of the Ottoman sultan.
Olivette
Olivette is a French feminine form of Oliver. It was the main character in the French opera Les Noces d’Olivette by Edmond Audran (1879). Olivette is one of the classiest names for girls that start with O. Perfect for a future poet or playwright.
- Origin: French, Germanic
- Meaning: Olive tree, elf warrior
- Pronunciation: ahl-i-VEHT
- Namesakes: Olivette N. Miller, an American musician, swing harpist, and singer.
- Popularity: Olivette left France’s top 500 names in 1945.
Olivia
Shakespeare used Olivia as a character in his comedic play Twelfth Night. The name wasn’t popular in the English-speaking world until the 20th-century. Today, it’s a top O name for girls in England and the United States.
- Origin: Latin
- Meaning: Olive
- Variations: Oliva
- Namesakes: Dame Olivia Newton-John, a British-Australian singer, actress, and activist who was a four-time Grammy Award winner.
- Popularity: Olivia was the number 1 name for U.S. girls in 2021.
Oliviarose
Oliviarose is new to the scene, first entering England and Wales’s top 1,000 in 2012. This long, sophisticated name can easily be broken into Olivia or Rose, giving you two lovely nickname options. We predict Oliviarose will make its way across the pond in the next year or two.
- Origin: Latin
- Meaning: Olive rose
- Variations: Olivia-Rose
- Namesakes: Olivia Rose Keegan, an American actress, singer, and model known for her portrayal as Claire Brady on Days of Our Lives.
- Popularity: Oliviarose was ranked 581st in England and Wales in 2021.
Ollie
Ollie was a common name for U.S. girls and boys in the early 1900s before falling out of favor in 1960. Ollie is strong, attractive, and gender-neutral. This could be a great option if you want a cool vintage name that is seldom used.
- Origin: English
- Meaning: Olive, elf warrior
- Pronunciation: AHL-ee
- Variations: Oli, Olly
- Namesakes: Oliver Martin Johnston Jr., an American motion picture animator for Disney.
- Popularity: Ollie received its highest rating of 462nd for U.S. girls in 1901.
Olsen
Olsen was originally a Norwegian surname. In modern times, the name is rarely used as a given name for boys and even more rarely for girls. Its association with the Olsen twins could give it a feminine edge.
- Origin: Danish, Norwegian, English
- Meaning: Son of Ole
- Pronunciation: AWL-suhn
- Variations: Olson, Olsson
Oluremi
Oluremi is an unusual choice on our list of girl names that start with O, primarily used by the Yoruba people in Nigeria, Ghana, and Benin. The adorable nickname, Remi, adds to its appeal.
- Origin: Yoruba
- Meaning: The lord consoles me
- Pronunciation: OO-loo-RE-MEE
- Namesakes: Oluremi Tinubu, a Nigerian politician who served as the first lady of Lagos State from 1999 to 2007.
Olwen
Olwen is derived from the Welsh “ol” (footprint, track) combined with “gwen” (white, fair, blessed). The name hails from Welsh mythology, borne by the beautiful daughter of the evil giant Ysbaddaden. She falls in love with the hero, Culhwch, who has to complete several challenging tasks to win her hand. Olwen is a romantic name that isn’t as basic as Juliet or Ophelia.
- Origin: Welsh
- Meaning: White footprint
- Pronunciation: OL-wehn
- Variations: Olwyn, Olwin
- Namesakes: Olwen Margaret Wymark, an American writer and playwright known for her plays Find Me (1977) and Mirror Mirror (1992).
Olympia
Olympia is the feminine form of the Greek name Olympos. It’s also the name of the Greek town where the Olympic games were held in ancient times. The perfect name for a future athlete.
- Origin: Greek
- Meaning: Unknown
- Namesakes: Olympia received its highest U.S. rating of 849th in 1917.
Omega
Omega was the genetic copy of the Mandalorian bounty hunter, Jango Fett, in Star Wars: The Bad Batch. Omega is also the final letter of the Greek alphabet. This futuristic name is well-suited for a girl whose big ideas will change the world.
- Origin: Greek
- Meaning: Greek letter
- Pronunciation: oh-MAY-gah
Omyra
Omyra is a variation of Myra and an English form of the Arabic name Omayra. Omyra is quirky and out of the mainstream – an appealing option for unique name lovers.
- Origin: English, Arabic
- Meaning: Myrrh, prosperous
- Pronunciation: o-MIE-ra
- Variations: Omayra, Omaira, Mayra, Maira
Ona
Ona is a short form of the Catalan name Mariona. It’s also the Catalan word for “wave.” A simple and beautiful choice for ocean lovers.
- Origin: Catalan
- Meaning: Wave
- Pronunciation: OH-nah
- Namesakes: Ona Grauer, a Canadian actress best known for portraying Emily Young in the science fiction television series Stargate Universe.
- Popularity: Ona is popular in Spain and ranked 59th in 2021.
Onaway
Onaway comes from Henry Longfellow’s epic poem, The Song of Hiawatha (1855). It’s loosely based on the myths of the Ojibwe people. In the poem, Onaway is an Ojibwe cry believed to mean “alert” or “awaken.” A powerful name for a girl with indigenous ancestors.
- Origin: Ojibwe
- Meaning: Awaken
- Pronunciation: OH-nah-way
Ondine
Ondine is the French version of Undine – a word created by 16th-century Swiss author Paracelsus for a group of female water spirits. This majestic name is perfect for fantasy lovers.
- Origin: French
- Meaning: Wave
- Pronunciation: un-DEEN
- Variations: Undine
- Namesakes: Robert Olivo, better known by his stage name Ondine, an American actor known for appearing in a series of films in the mid-1960s by Andy Warhol.
Oneida
Oneida is the name of a Native American tribe native to upstate New York near the Great Lakes. This lovely tribal name could pay homage to your indigenous ancestors.
- Origin: Oneida
- Meaning: Standing rock
- Pronunciation: o-NIE-dah
- Popularity: Oneida received its highest U.S. rating of 882nd in 1919.
Oney
Oney is an Anglicized form of Ó Niadh (descendant of Niadh, champion). It’s also the name of a town in Ireland. Oney is a charming Irish name, through and through.
- Origin: Irish
- Meaning: Champion
- Pronunciation: OH-nee
Oni
Oni is a cute name among the Yoruba people of Western Africa, meaning “today” or “the present.” In Japanese folklore, however, an Oni is a demon that imposes terror and dread on all who face it. Perhaps your little Oni will live in the present – without fear of what tomorrow brings.
- Origin: Yoruba, Japanese
- Meaning: Today, to hide
- Pronunciation: O-nee
Onna
Onna is the feminine form of Onno – a Dutch name ultimately from the Old High German “unnan” (to grant, to allow, to yield). Onna radiates friendliness and warmth and could be a sweet alternative for Anna.
- Origin: Dutch, Frisian
- Meaning: To allow
- Pronunciation: AWN-na
- Namesakes: Onna White, a Canadian choreographer, and dancer, has been nominated for eight Tony Awards.
Onora
Onora is the Anglicized form of Onóra – the Irish version of Honora. The diminutives of this name – Nora and Norah – are far more popular stateside. Onora could be an original option for parents who love Nora but want something a tad more original.
- Origin: Irish, Roman
- Meaning: Honor, esteem, dignity
- Pronunciation: OH-NOR-AH
- Variations: Onnora, Onoria, Onore, Onorie, Onory, Onorye, Ynory, Onorina
- Namesakes: Onora Sylvia O’Neill, a British philosopher and a crossbench member of the House of Lords.
Onyx
Onyx is a beautiful gemstone that’s typically black and white. It’s an uncommon name for U.S. girls, never ranked in the top 1,000. Onyx could be a badass choice for a baby of either gender.
- Origin: English
- Meaning: Claw, nail
- Pronunciation: AHN-iks
- Popularity: Onyx is more popular for U.S. boys, ranked 406th in 2021.
Oona
Oona is an Anglicized form of the Irish Úna. It’s commonly used in Finland. The double-o beginning gives Oona a quirky feel. A perfect choice for a girl who will be anything but ordinary.
- Origin: Irish, Finnish
- Meaning: Lamb
- Pronunciation: OO-nah, O-nah
- Variations: Una
- Namesakes: Oona O’Neill, an actress who was the daughter of Irish-American playwright Eugene O’Neill and English-born writer Agnes Boulton.
- Popularity: Oona left the U.S. top 1,000 in 1941.
Oonagh
Oonagh is a rare Anglicized form of Úna, primarily chosen for girls with Celtic ancestry. The name got some buzz after Amber Heard chose it for her daughter in 2021.
- Origin: Irish
- Meaning: Lamb
- Pronunciation: OO-nah
- Variations: Oona, Úna
- Namesakes: Oonagh Guinness, an Anglo-Irish socialite, society hostess, and art collector.
Opal
Opal reentered the U.S. top 1,000 in 2017 after a 57-year lapse. This vintage girl’s name is derived from the Sanskrit “upala” (jewel). The iridescent gemstone is associated with the month of October – perfect for fall babies!
- Origin: English
- Meaning: Jewel
- Namesakes: Opal Palmer Adisa, a Jamaica-born award-winning poet, novelist, performance artist, and educator.
- Popularity: Opal was ranked 547th in the U.S. in 2021.
Opaline
Opaline is an elaborate variation of Opal. If you love long, vintage names, Opaline could be the one.
- Origin: English
- Meaning: Resembling an opal
- Pronunciation: O-pah-line
- Namesakes: Opaline Deveraux Wadkins, an African-American nurse who organized the first training school for black nurses in Oklahoma City and fought for the desegregation of the College of Nursing at the University of Oklahoma.
Ophelia
Ophelia was rare in ancient times. Shakesphere revitalized it in his tragic play, Hamlet, borne by the lover of Hamlet, who goes insane and drowns. Despite the negative association, Ophelia’s popularity is rising, ranked in the top 1,000 names for U.S. girls since 2015.
- Origin: Greek
- Meaning: Help, advantage
- Pronunciation: o-FEEL-ee-ah
- Variations: Ofeliya
- Namesakes: Ophelia Magdalena Dahl, a British-American social justice and healthcare advocate who co-founded the non-profit healthcare organization Partners In Health.
- Popularity: Ophelia’s U.S. popularity is rising, ranking 321st in 2021.
Ophir
Ophir hails from the Bible as the son of Joktan in the Old Testament. It was also the name of a prosperous region from which King Solomon received gold, silver, ivory, peacocks, and other riches every three years. Ophir could be a great option if you want a unique biblical name that isn’t overused, like Mary or Hannah.
- Origin: Hebrew
- Meaning: Unknown
- Pronunciation: o-FEER
- Variations: Ofir
Oprah
Oprah is best known as the beloved host of the Oprah Winfrey Show. Her name was actually Orpah, inspired by a person in the Bible. However, her family mispronounced and misspelled her name as “Oprah,” leading her to adopt the title. An original choice for Oprah fans.
- Origin: Hebrew
- Meaning: Back of the neck
- Pronunciation: OP-rah
- Variations: Orpah, Orpha
- Namesakes: Oprah Gail Winfrey, an American talk show host, television producer, actress, author, and philanthropist.
Orabel
Orabel is an unusual Latin name, never making the top 1,000 in any country. Ora and Bell are cute names in their own rights, making Orabel a sweet combo.
- Origin: Latin, English
- Meaning: Easily entreated
- Pronunciation: or-rah-BELL
- Variations: Orabilia, Arabel
Oracle
Oracle is an uncommon O name for girls. It’s derived from an English word for an ancient priestess who worked as a medium for the gods. It may appeal to parents who enjoy card reading, fortune telling, or other activities that require knowledge from the great beyond. Perhaps your little Oracle will have insight into the future.
- Origin: English
- Meaning: Prophecy
- Pronunciation: AW-ruh-kul
Orah
Orah is a variation of Ora, both feminine forms of the Hebrew masculine name Or. This lovely title was popular in the U.S. in the late 1800s. An appealing option for vintage name enthusiasts.
- Origin: Hebrew
- Meaning: Light
- Pronunciation: OR-ah
- Variations: Ora
- Popularity: Orah left the U.S. top 1,000 in 1892.
Oralee
Oralee is an exciting choice on our list of women’s names that start with O, with few modern bearers. While its origins are uncertain, most scholars agree it’s an obscure form of the French name Aurélie. Oralee’s only setback is that it sounds like “orally.”
- Origin: English, Roman
- Meaning: Golden, gilded
- Pronunciation: OH-rah-lee
- Variations: Aurélie, Oralie
Orange
Orange is an unusual choice among our female names that start with O, first used during medieval times. It was initially a habitational name for someone from one of the many places called Orange in France. Today, it’s associated with the color and the fruit. Quirky fruit names like Orange are popular among celebrities – as in the case of Gwyneth Paltrow’s daughter, Apple.
- Origin: French, Celtic
- Meaning: Temple, orange tree
- Pronunciation: O-rinj
- Variations: Orenge, Orengia
- Namesakes: Orange Jacobs, an American lawyer, newspaper publisher, and politician in the late 1800s.
Orazia
Orazia is the Italian version of Horatia. It’s ultimately derived from the Latin “hora” (hour, time, season). Orazia sounds more modern – and less formal – than stuffy Horatia, potentially appealing to 21st-century parents. Nicknames include elegant Ora and zingy Zia.
- Origin: Italian, Roman
- Meaning: Hour
- Pronunciation: ORAH-zee-ah
- Variations: Horatia
Orchid
Plant lovers will appreciate Orchid – a name inspired by the beautiful flower species with colorful and fragrant blooms. Although the meaning may turn some parents off, the goods of this lovely floral name certainly outweigh the bad.
- Origin: Latin, Greek
- Meaning: Testicle
- Pronunciation: OR-kuhd
Orelia
Orelia is an old-timey variation of Aurelia, commonly used in Europe, the Mediterranean, and South America. The name has been sparingly used in the U.S. since the late 1800s. Vintage names are very “in” right now, making Orelia a trendy O name for girls that isn’t overused.
- Origin: Roman
- Meaning: Golden one
- Pronunciation: ow-RE-lee-ah
- Variations: Orelias, Aurelia
- Namesakes: Orelia Key Bell, an American poet and author whose work includes Millennium Hymn (1893) and Poems (1895).
Oria
Oria is the Italian form of Aurea – a Late Latin name from “aureus” (golden). It’s also the name of a beautiful town in Italy known as a hub for writers, artists, and intellectuals. A sophisticated choice for an intelligent girl whose creativity will be her shining achievement.
- Origin: Italian
- Meaning: Golden
- Pronunciation: oh-REE-AH
- Variations: Aurea
Oriana
Oriana may be derived from the Latin word for “rising” (as in the sunrise) or the Spanish and Portuguese word for “gold.” The name was used in 17th-century literature to reference Queen Elizabeth or Queen Anne of Denmark. Oriana’s ties to royalty make it an apt choice for a modern-day princess.
- Origin: Latin, Spanish, Portuguese
- Meaning: Rising, gold
- Pronunciation: o-RYA-na
- Variations: Oriane, Orianne
- Namesakes: Oriana Fallaci, an Italian journalist, and author during World War II.
Orihime
In the Shinto tradition, Orihime was a weaver deity. She fell in love with Hikoboshi, the cow deity, and stopped attending to her weaving duties. Because of this, Orihime’s father only allowed her to see Hikoboshi once per year. Today, the Tanabata festival in Japan celebrates these star-crossed lovers.
- Origin: Japanese
- Meaning: Weaving princess
- Pronunciation: O-REE-HEE-MAY
Orilla
Orilla is an unusual variation of Arilla, derived from the Greek “amarysso” (to sparkle). The name was inspired by the Amaryllis – an African flower known for its beautiful red blooms. Orilla is an excellent option if you want a floral name that’s less obvious than Lily, Rose, or Daisy.
- Origin: Latin, English, Greek
- Meaning: To sparkle
- Pronunciation: oh-REE-yah
- Variations: Arilla
Orinda
Orinda is a sweet option on our list of female names that start with O, either derived from the Spanish “oro” (gold) or “linda” (pretty). This was the pen name for 17th-century English poet Katherine Philips, known for her translations of Pierre Corneille’s Pompée and Horace. Orinda is also a town in central California.
- Origin: Spanish, English
- Meaning: Gold, pretty
- Pronunciation: or-RIN-dah
Orinthia
Orinthia is derived from the Greek “orino” (to excite, to agitate). It belonged to the king’s mistress in George Bernard Shaw’s satirical comedy, The Apple Cart (1929). Orinthia sounds formal and upper-class – perfect for a future socialite.
- Origin: Greek
- Meaning: To excite
- Pronunciation: oh-ren-THEE-ah
Orit
Orit is a common O name for girls in Israel but rare elsewhere. While Orit isn’t the most aesthetic name, its lovely meaning may be perfect for a girl who “lights” up the room. An original choice for an Israeli-American.
- Origin: Hebrew
- Meaning: Light
- Pronunciation: oh-REET
- Variations: Or, Ora, Orah
- Namesakes: Orit Gadiesh, an Israeli-American corporate strategist and chairperson of Bain & Company, a management consulting firm.
Orleans
Orleans is one of the prettiest place names for girls on our list, associated with several American towns. The most famous is New Orleans in Louisiana, known for its jazz music, Creole cuisine, and Mardi Gras festival. Your little Orleans will carry the soulful spirit of the city with her wherever she goes.
- Origin: English, French, Roman
- Meaning: of Aurelianus
- Pronunciation: awr-LEENZ
- Variations: Orléans
Orli
Orli is an adorable Hebrew name commonly given to girls of the Jewish faith. Its simplicity has put it on the map in several English-speaking countries. It has yet to make the U.S. top 1,000, making it a great option if you want something short and original.
- Origin: Hebrew
- Meaning: Light for me
- Pronunciation: OR-lee
- Variations: Orly
- Namesakes: Orli Shaham, an American pianist born in Jerusalem, Israel.
Ornella
Ornella is derived from the Tuscan Italian “ornello” (flowering ash tree). The ash tree symbolized protection, healing, and immortality in many cultures. Perhaps your little Ornella will be blessed with good health.
- Origin: Italian
- Meaning: Flowering ash tree
- Pronunciation: or-NEHL-la
- Namesakes: Ornella Ongaro, known as “La Tulipe” because of her pink racing colors, is a French Grand Prix motorcycle racer.
- Popularity: Ornella was popular in France in the 1990s and early 2000s.
Orphie
Orphie is a diminutive of the biblical name Orpah. Orphie is quirky and fun, whereas Orpah is serious and old-fashioned, giving the name a more youthful spin. An excellent alternative for popular Murphy.
- Origin: English, Hebrew
- Meaning: Back of the neck
- Pronunciation: OR-fee
- Variations: Orpha, Orphy, Orpah
Orquídea
Many words sound more elegant when spoken in romance languages. This includes Orquídea – the Spanish and Portuguese word for “orchid.” This elegant floral name could help your daughter blossom into a beautiful young woman.
- Origin: Spanish, Portuguese
- Meaning: Orchid
- Pronunciation: or-KEE-de-a
Ortensia
Ortensia is the Italian word for the Hydrangea plant – a lovely flower with long-lasting blue, violet, pink, white, or chartreuse blooms. Fans of the famous Australian singer and songwriter will appreciate the nickname Sia.
- Origin: Italian
- Meaning: Hydrangea
- Pronunciation: or-TEN-see-uh
- Variations: Hortensia, Ortenzia
Orva
Orva is a vintage option on our list of names for girls that start with O, given initially as a female form of Orville. However, it’s also occasionally given to males as a variation of Alva.
- Origin: English
- Meaning: Golden city
- Pronunciation: OR-vah
Osanna
Osanna is a religious option on our list of names for girls that start with O. It derives from a Hebrew expression meaning “praise God,” which the Israelites used to glorify Jesus throughout the New Testament. A meaningful option for a girl of the Christian faith.
- Origin: Italian
- Meaning: Praise God
- Pronunciation: o-ZAN-ah
- Variations: Hosanna
- Namesakes: St. Osanna, a 15th-century Italian catholic saint believed to be a mystic and a visionary.
Otome
Otome is a cool Japanese name primarily given to manga characters. Otome games (or “maiden games”) are female-oriented games with romantic, story-based plots. A badass choice for anime lovers or gamers.
- Origin: Japanese
- Meaning: Maiden
- Pronunciation: O-TO-MEH
Otta
Otta is the feminine form of Otto. It may also be a shortened version of the Swedish name Ottilia. Historically, the Swedes gave this name to their eighth-born child due to the similarity to “åtta” (Swedish for eight). This typical Scandinavian name could be a pleasant choice for your daughter (regardless of her birth order).
- Origin: Scandinavian, Czech
- Meaning: Wealth, fortune
- Pronunciation: AA-tuh
- Variations: Otti, Ottine
- Namesakes: Otta Wenskus, a German Classical philologist currently residing in Austria.
Ottelette
Ottelette is an unusual diminutive of Otta, primarily used in Scandinavia. It looks strikingly similar to Omelette, possibly appealing to breakfast lovers. This long name is tricky to spell, so it may be a tough “egg” to crack.
- Origin: Walloon, Scandinavian
- Meaning: Wealth, fortune
- Pronunciation: aw-te-LEHT-te
Ottilie
Ottilie is a chic, French form of Odilia – a German feminine name derived from Otto (wealth, fortune, prosperous in battle). A youthful nickname option is Tilly.
- Origin: French
- Meaning: Wealth
- Pronunciation: aw-TEE-lye
- Variations: Odilia, Odilie
- Namesakes: Odile of Alsace, a saint venerated in the Catholic Church as the patroness of good eyesight and the region of Alsace.
- Popularity: Ottilie is popular in England and Wales, ranked 118th in 2021.
Ottoline
Ottoline is associated with Lady Ottoline Morrell, a 20th-century society hostess with influence over several artistic and intellectual circles. Unlike Madeline and Caroline, names ending in “line” are long-time favorites stateside. Ottoline fits this trend but is original and mature-sounding, adding to its appeal.
- Origin: English
- Meaning: The lord consoles me
- Pronunciation: OT-uh-line
- Variations: Odile, Odette, Ottilie
- Namesakes: Lady Ottoline Morrell, an English aristocrat and society hostess.
Ouida
Ouida is a poetic option among our classy girl names that start with O, used as the pen name for English author Marie Louise Rame. The name arose from a childhood mispronunciation of her middle name, Louise. A stunning choice for a future novelist or poet.
- Origin: English, French
- Meaning: Famous warrior
- Pronunciation: WEE-DAH
- Namesakes: Ouida, the pseudonym of the English novelist Maria Louise Ramé, who wrote over 40 novels, children’s books, and essays in the 19th-century.
- Popularity: Ouida left the U.S. top 1,000 in 1944.
Ouka
In Japanese culture, the cherry blossom represents renewal and the fleeting nature of life. The tree’s blossoms only last for a few weeks before they start to fall. Your little Ouka could deeply appreciate life and make every moment count.
- Origin: Japanese
- Meaning: Cherry blossom
- Pronunciation: oh-KAH
Oumou
Oumou is the Western African form of Umm, primarily heard among Muslims in Mali, Senegal, Burkina Faso, Côte d’Ivoire, Guinea, and Niger. An unusual and unique choice outside of Africa.
- Origin: Bambara
- Meaning: Latecomer
- Pronunciation: OO-moo
- Variations: Umm, Umama
- Namesakes: Oumou Sangaré, a Grammy Award-winning Malian Wassoulou musician, also known as “The Songbird of Wassoulou.”
Owena
Owena is a rare choice among our O names for girls, as the feminine form of Owen. Owen is a top choice for boys in six countries. Owena, on the other hand, has never been ranked anywhere. If you love the name Owen but think it’s too mainstream, Owena is a great way to use it in a non-typical fashion.
- Origin: Welsh
- Meaning: Sheep kin
- Pronunciation: O-ina
Ozara
Ozara hails from Serbia, derived from the words “ozariti” (to make radiant) or “ozaren” (radiant). Zara is hot in the U.S. right now, ranked 213th in 2021. Ozara is just as pretty – just with an additional O.
- Origin: Serbian
- Meaning: To make radiant
- Pronunciation: AW-zah-rah
Ozzy
Ozzie is a badass baby name associated with English singer Ozzy Osborn. To make the name cuter and less “heavy metal,” you could go for the Ozzie variation instead.
- Origin: English
- Meaning: Power god, bear god
- Pronunciation: AWZ-ee
- Variations: Ozzie
O Names for Girls FAQs
What Is a Rare Girl Name That Starts with O?
Most girl names that start with O are quite rare, with very few in the mainstream. Some of the rarest are Oumou (latecomer), Oracle (prophecy), and Ottelette (wealth).
What Is the Prettiest O Name for a Girl?
Some of the prettiest O names for girls are also the most popular, including Olivia and Ophelia. Some gorgeous vintage options are Opal and Olive. All four names are currently ranked in the U.S. top 1,000 girl names.
